Seeking Perfection
There are times when a mistake is made, or when a certain part of the circuit has to be re-done. And since there is no dual-headed soldering iron with the exact width for removing, here's a guide to help you to remove those parts with just a regular iron and a solder pump.
Procedure
First, try to clean off as much solder as you can, sometimes this is all you need and the component will come right out. If the legs are surrounded by very little amount of solder, and the solder pump can't suck it out, feel free to add some more solder to help the sucking process.
When working with computer parts, you'll find that most of the holes on the PCB is bigger than the component legs, this allows some wiggling around when we remove the part. Heat up one leg of the component, very gently apply some force pointing at its opposit leg, and wiggle it, due to the gap between the hole and the leg, part of the leg will come out, repeat this process till you get both legs off. (This method only work with 2 legged components, for multi-leg mounts, a totally different set of tool is used, and is currently not covered in this guide)